Means for driving screw piles and cylinders



Oct. 12 1926. 1,602,674"

J. H. HUMPHRYES MEANS FOR DRIVING SCREW FILES AND CYLINDERS 4 1926 3 Sheets-Sheet 1 I'm/anion Oct; 12,1926. 1,602,674

J. H. HUMPHRYES MEANS ,FOR muvme scamw FILES AND cymumms Filed Jan. 4. 1926 s s eets-sheet 2 jnvegtor.

5 h} TH um ryci'co ATZ s.

J. H. HUMPHRYES MEANS FOR DRIVING SCREW FILES AND CYLINDERS Filed Jan. 4, 1926 3 Sheets-Sheet 5 Invavton JJY'Hump b? Patented Oct. 12, 1926.

umrrn "STATES JAMES HTUL SE HUM-PHRYES, OI WESTMINSTER LONDON, GLAND.

MEANS roza DRIVING SCREW runs. Ann CYLINDERS.

A pplieatie n filed January This invention relates to improvements nme n ar darin sc ew P s iw ders, and refers particularly'to means of the type in which a framework carries apowerunit, or units with reduction gearing transmittingthe power to a central rotatable member which receivesor engages the head of a pile or cylinder to be driven. The weight of the framework andmechanism is supported by the pile or cylinder during the driving operation, and rotation of the framework relative to the pile or cylinder is prevented suitable anchorage ropes or cables.

driving piles or cylinders ofl-arge diameter, an enormous torque has to be applied, and in machines as hitherto employed, where the head. of the pile, orof an adaptor to'engagethe head of the pile or cylinder, is

received in a chuck member in the ax s of the rQtatable central member of the machine, this torque has to he applied at a very short radius. The driving torque to the rotatable member on the other hand is usually applied through gearing to gear teeth on the periphery of the rotatable memher which is normally of large diameter, and there isthus-a heavy bending moment applied to the spokes or arms of the vrotatable member, and the parts of the chuck are under severe shearing stress.

' The-object of my invention is to provide an impr ved machineinwhic h these heavy bending and shearing stresses are practicallyeliminated, so thatthe danger of fracture of parts rise removed and the general construction can be considerably lightened.

The manner in which these objects are attained will beapparent from the description below withreference to theaccompanyn draw gs wh h Figiir e 1 is a plan showing the arrangemen of the rev un nd sea i 'Fi ure 2 is a longitudinal vertical sec- Qn i hro gh h ax o t e n m rbtat bl membe I'Eigure 3 ,a. plan of one half of the central member with anadaptor "in position.

.Eigure d is a section 011" the line" 44 of l Fi I 3. 4 i to the wheel are illustrated in Figs. 3 and 4.

the arrangement illustrated, the power units consist of two similar electricinotor's' a,symmetrically, disposed opposite sides of the centre of the machine. ach motor shaft thro u ha couplin Z) drives a worm meshing wi h a worm w eel in a casing 0. On the shaft of the worm-wheel is a pinion 4, eze. Serial n. 79,278.

d meshing with .a gear wheel 6, and on the shaft ofjthis wheel is a further pinion f meshing with gear teeth on the periphery of the central rotatable memheror wheel 9. The gear-teeth are preferably of the doublehelical type.

The method of mounting the wheel 9 is shown in Fig. 2. The wheel is secured upon the lower end of a tubular sleeve 11. which. is rotatably mounted in flanged bushes 7' secured in, the framework 70. Floating oil rings Z interposed between the sleeve and the bushes are adapted to take any wear, and can be readily renewed. Thevertical thrust betweenthe wheel and the framework when screwing piles or cylinders is taken by the annular shoulder m on the wheel. Preferably a shoulder. a is also provided on the sleeve to'take the thrust when screwing piles [of small diameter of which the upper ends fits within the lower end of the sleeve which may be squared to receive them. The wheel 9 is formed in two parts, the outer-rim which carries the gearteeth be ing bolted to the main body o'fthe wheel. In .the rim adjacent to the teeth are formed recesses g to receive upstanding .bosses 0 on a hollow truncated conical adaptor 0 having a flange at its lower end to which the upper end of a cylinder to bescrewed is adapted to be bolted as shown in Fig. 2. The adaptor has tosupport the weight of the machine when a cylinder is being screwed and is therefore stiifened against vertical thrust by radial ribs It will readily be seen that the torque required to rotate a cylinder bolted to the lower end of the adaptor is transmitted throughthe adaptor from the bosses 0 which are engaged by the wheel at a radius little less than that of the pitch circleof the gear, teeth. Thus the bending moment on the wheel is practically negligible, and the central'parts of thewheel are relieved of all stress so that the wheel and its mounting' ca'n be made very much lighter thanin the usual type of construction. Another form of adaptor and an alternative means for connecting the adaptor Connection between a cylinder and the wheel g'ismade through an adaptor p of truncated inverted conlcal outline with an annular flange g at its lower end to'which the'c'ylinderis adapted tobe bolted.

The upper end of the adaptorl has a num ber of segmental upstandlng members 1' which are adapted to enter segmental openings a in the wheel adjacent to its periphery. The members 1 are of hollow box section for lightness and the inner and outer curved walls are connected by radial ribs 25 to give rigidity. The inner w ls of the members 1' lie against an annular upstanding rib 'u on the wheel, and the adapter is bolted to the wheel at intervals to support the weight of the adaptor. These bolts do not, however, take any of the torque as this is taken between the ends of the members r on the adaptor and the ends of the openings 8 in the wheel. Stiffness in an axial direction is given to the adaptor by inclined radially directed ribs 22. w, integral with the side walls of the adaptor and with the bottom flange Q and with the members r.

The construction of the wheel itself will be obvious from rigs. 3 and 4-. The rim which carries the gear-teeth 00 and in which are formed the openings 8 is carried by substantial spokes or arms 1 from a central boss which is rotatably supported in the machine as described with reference to Figs. 1 and 2.

I claim 1. A machine for driving screw cylinders,

comprising [a frame, self-contained power means carried by the frame, a peripherally toothed wheel member rotatably mounted on said frame, reduction gearing between the power means and the wheel member, and means for connecting the wheel member to a cylinder to be driven at a radius substantially equal to the radius at which the drive applied from the gearing to the wheel member.

2. A machine for driving screw cylinders con'iprising a frame, self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel member, and an annular adaptor connecting the wheel member adjacent to its periphery to a cylinder to be driven.

3. A machine for driving screw cylinders, comprising a frame, self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel member, and a truncated inverted conical adaptor keyed at its upper end to the wheel member adjacent to the periphery thereof, and having means at its lower end by which it can be connected to a cylinder to be driven.

4:. A'machine for driving screw cylinders comprising a frame, self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel member, and a truncated inverted conical adaptor, which is to be connected at its lower end'to a cylinder to be dr ven, and at its upper end has upstanding segmental parts entering within cmnplemcntary segmental openings in the wheel member adjacent to the periphery thereof.

5. A machine for driving screw cylinders comprising a frame, self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel memb r and a truncated inverted conical adaptor, which is to be connected at its lower end to a cylinder to be driven, and at its upper end has upstandin segmental parts entering within complementary segmental openings in the wheel member adjacent to the periphery thereof, the said segmental parts being of hollow box form, and having an inner wall which lies against, and is bolted to, an upstanding annular flange on the wheel member.

6. A machine for driving screw cylinders, comprising a frame. self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel member, and a truncated inverted conical adaptor having at its upper end upstanding segmental parts entering within complementary segmental apertures in the wheel member adjacent to tbeperiphery thereof, and having at its lower end a horizontal flange to which a eylinder to be driven is bolted.

7. A machine for driving screw cylinders, comprisin a frame, self-contained power driving means carried by the frame, means for rotatably supporting a peripherally toothed wheel member centrally in the frame, reduction gearing connecting the power driving means to the wheel member, and a truncated inverted conical adaptor having at its upper end upstanding segmental parts entering within complementary segmental apertures in the wheel member adjacent to the periphery thereof, and having at its lower end a horizontal flange to which a cylinder to be driven is bolted, the said adaptor being stiffened against axial thrust by integral radially directed ribs extending between the said segmental parts and the said bottom flange.

In testimony whereof I atiix my signature.

JAMES nunsn HUMPHRYES. 

